Rei is Neo's sister and she get pulled to the Digital World at the sametime as the Alias 3, She is saved by Taichi and Zero and decides to help them. She cannot walk in the real world because of an accident. She is able to walk in the Digital World and her pendant turns out to be a Digimental that Neo uses to make Arkadimon stronger.
She gets mad at Neo when she finds out that he wants Taichi and his group out of the way. He has her locked away in a room but she is released by Pal + Pul who are 2 Petite Mamemon. On her, Sigma and Mari's escape Neo orders them to be brought back *Rei has a chip that i believe can Arkadimon. *darn my none-japanese reading skills* The Digimon knocks Rei out cold and again is saved by Taichi.
She doesn't have any official Digimon as her own but Igamon as well as Pal + Pul protect her. When Zero + Arka go for the final battle she jumps off a cliff not wanting to see the violence anymore *oh and jumping off a cliff isn't violent Rei*. She is saved by Zero and she cries at Neo for him to stop. On returning to the real world she keeps up her friendship with Taichi and the others.
XROS WARS (Young Hunters)